Door closer and check.



' 'PATENTED DEG. Q4, 1907- R. ADAMS. DOOR CLOSER AND CHECK.

APPLICATION FILED JUNE 28, 1904.

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APPLIOATION FILED JUN}; 28, 1904.

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PATBNTED'DEG. 24, 1907.

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APPLIOATIOF FILED JUNE 28, 1 904.

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ROBERT ADAMS, OF LONDON, ENGLAND.

DOOR CLOSER AND CHECK.

Specification of Letters Patent.

Patented Dec. 24, 1907.

Application filed June 28, 1904:. Serial No. 214,525.

To all whom it may concern:

Be it known that 1, ROBERT ADAMS, a subject of the King of GreatBritain, residing at 67 Newington Causeway, London, England, engineer,have invented certain new and useful Improvements in Door Closers andChecks, of which the following is a specification.

The object of my invention is to effect improvements in single anddouble acting doorsprings and in checks for same, and consists insimplifying the construction and reducing friction in action and theamount of workmanship necessary in finishing and assembling the variousparts. By my improvements thecost of production of such articles isreduced, while providing for all the necessary adjustments and retaining(or) and improving the general eiiiciency of the more expensivearrangements.

My invention is illustrated by the accom panying drawings in whichFigure 1 is a plan view of a double action door-spring and check; Fig. 2is a detail sectional view of the-spring-fitting; Fig. 3 is a plan viewof a single action door-spring and check; Fig. 4 is a plan view of achecking device suitable for use with the door springs.

Referring to the double-action door-spring shown in Fig. 1, a is thepivot or lower center upon which the door is mounted. a represents oneof a pair of arms integral with the pivot. I provide a pair ofaction-plates 6, one at each side of the box, said action-plate 6 beingfulcrumed at p in suitable recesses cast or formed in the walls of thebox, their opposite ends being connected to the arms a by linksn and oThe action-plates e are formed or provided with abutments n to limit themotion one way of the links 12?, so that, as shown in Fig. 1, when thedoor is in its closed position the pivots of the links are out of line.By this means, whichever way the door is opened, the links which are notin tension, being collapsible, freely fold out of the way so as to offerno resistance to the spring action. The links a are preferably curved asshown to accommodate the pivot and provide a smooth action when the dooris being opened.

d is the spring which is compressed between the action plates e, thearrangement and construction of the spring-fitting being designed, asshown in Fig. 2, to facilitate the adjustment of its powerand to enablethe same to be readily mounted and dismounted from between theaction-plates e. For this purpose the sdpring d is mounted between theabutments 2 and 01 the former being formed or provided with ascrew-threaded (or partially screw-threaded) stem (1 and the latter (dbeing formed with a tubular socket d Interposed between the spring (1and the abutment d is a flanged nut d which is internally threaded toengage the screw thread of the stem (1 Both abutments d and d are formedwith knife-edges or like projections 61 which engage in correspondingrecesses e formed in the plates e, so that neither abutment is capableof rotating, thus enabling the nut d to be rotated for adjustment withthe use of one hand only. The stem (1 is free to slide within the socketd The end of the stem 61 is drilled through at (i so that when the dooris opened and the spring compressed, the hole (1 arrives opposite andcoincides with a hole at drilled through the abutment (1 in this steelpin or wire may be inserted t ough d and d to interlock the two parts,and on further opening the door the spring fitting may be whollyremoved.

The action-plates e are preferably formed of a channel or box section asshown in Fig. 2, and are each formed with two or more recesses c for theabutment edges d", so as to enable the spring to act equally between theplates interchangeably at a greater or lesser leverage to suit externalconditions or other requirements, also to enable the spring to act uponone plate at a greater leverage than the other so as to secure completeclosing in opposition to extra external resistance at one side, such aswind. One or both of the actionplates e may be provided with a screw for other means for securing alinement of the door by setting oif theactionplates more or less angularly from the walls of the box. Thescrews f ortheir equivalent are also useful to compensate for slacknessof the pivots arising from wear, and for general adjustment purposes.

In the single-action door-spring shown in Fig. 3, the spring (I iscompressed between the action plate a and the end wall of the box; inthis case the plate 6 is arranged across the box as shown, beingfulcrumed at p and connected to the arms a of the pivot a by a curvedlink n. The end wall of the box and the action-plate e are each providedwith recesses c, to allow of the adjustment of the spring leverage.

osition a Fig. 4 shows a modification in which each action-plate isacted upon by a separate spring, which may be of the ordinary type asshown or of the type shown in Fig. 2. I11 this door spring (which isshown as a doubleaction spring). the arm a of the pivot a is providedwith a stud and (or) anti-friction roller a which works against theinner surfaces of the V shaped lever is pivoted to the box at k. Thelever 7L may be formed in two parts, as two arms pivoted upon a commonpivot 7c. The action-plates e are fulcrumed at p in the side walls ofthe box, and are connected by links Z with the lever or double arms isas shown.

The checking devices shown in Figs. 1, S, and 4 are particularlysuitable for use with the doorsprings hereinbefore described owing totheir peculiar arrangement and construction in combination with saiddoorspring fittings. In Figs. 1 and 4 the check cylinder h is pivoted ati in the bottom of the box and in a cross plate m, the piston rod 0being pivoted at 0 to the end of a forked check lever t which is pivotedat t to a cross plate 25 The door-pivot a is formed with an arm a whichcarries a stud or stud and roller a arranged to work within the fork ofthe check lever 25, as indicated by the full and dotted lines in Fig. 4,in which figure the spring fittings are omitted for the sake ofclearness.

As will be understood, for a single action the check lever 25 has onlyone pair of guides 1*, 1" as shown by the dotted .lines in Fig. 3, thecheck piston rod 0 being pivoted to the check lever t at the end of theguide 1*.

I claim 1. In a door closer, the combination with a casing, of a doorpivot rotatably mounted in said casing, links operatively connected withand adapted to be actuated by the pivot, plates having one end thereofoperatively connected to the said links, and the other ends fulcrumed inthe casing, an arm on said pivot, a lever operatively connected to saidarm, an adjustable actuating spring engaging the plates for returningthe pivot to its normal position, and adjusting devices for regulatingthe tension of said spring.

2. In a combined door closer and check, the combination with a casing,of a door pivot rotatably mounted in said casing, links operativelyconnected with and adapted to be actuated by the pivot, plates havingone end thereof operatively connected to the said links, and the otherends fulcrumed in the casing, an arm on said pivot, a lever operativelyconnected to said arm, a checking device actuated by the latter forretarding the movement of the pivot in one direction, an adjustableactuating spring engaging the plates for returning the pivot to itsnormal position, and adjusting devices for regulating the tension ofsaid spring.

3. In a door closer and check, the combination with a recessed casing,of a movable pivot, links fulcrumed in the recessed portion of thecasing and operatively connected with and adapted to be actuated by themovable pivot, actuating plates operatively connected to said links, anadjustable spring contacting with the plates intermediate theirextremities and adapted to control the movement of the pivot, and achecking device operatively connected to and actuated by the pivot andworking in opposition to the spring for retarding the movement of thepivot.

4. In a combined door closer and check, the combination with a casinghaving recesses in its sides, a rotary pivot mounted therein andprovided with laterally extended arms, links connected with and adaptedto be actuated by the arms of the pivot, plates having one extremitymounted in the recessed portion of the casing, and the other extremi tyconnected to the links, an adjustable spring intermediate theextremities of the said plates and in contact therewith, and a checkingdevice opcratively connected with and adapted to be actuated by thepivot for retarding the movement thereof.

5. In combination, a casing, a movable pivot mounted therein, linksoperatively connected with and adapted to be operated by the same, aspring, and plates in contact with the spring at one side thereofintermediate their extremities and with the casing at the opposite sideof one extremity.

6. In combination, a casing having recesses, a movable pivot having armsin said casing, links operatively connected with and adapted to beactuated by the arms of the pivot, plates connected with said links atone end thereof, and the other end of the same mounted in the recesses,and a spring mounted in the casing between the plates and having contactintermediate the extremities of the latter for controlling the movementthereof. 7

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ROBERT ADAMS. Witnesses:

GEORGE C. DOWNING, WALTER J. SKERTEN.

